Pencil



PENCIL. APPLICATION FILED APR.25. 191s.

STATES KVORNING, OF MINNEAPOLIS, MINNESOTA, OF ST. PA'UL, MINNESOTA,CORPORATION PENCIL.

Leraars.

To all whom it my comem:

Beit known that we, FRANK J. VIERLING, a citizen of the United States,and AND-REW KVORNING, a subject of the King of Denmark, residing atMinneapolis, in the county of Hennepin and State of Minnesota, haveinvented certain new and useful Improvements in Pencils; and we dohereby declare the following t'o be a full, clear, and exact descriptionof the invention, such as will enable othersskilled in the art to whichit ap ertains to make and use the same.

ur invention has for its object to provide an improved pencil, and tothis end, it consistsof the novel devices and combinations of deviceshereinafter vdescribed and defined in the claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.'

Referring to the drawings:

Figure 1A is an elevation of pencil;

Fi 2 is an enlarged view of the improved pencil, principally inlongitudinal central the improved section;

casing having a contracted -m a slight modi cation; and

longitudinal sec- Fig. 3 is a detail view of the friction device, insection, takenV on the line 3--3 of Fig. 2;

ig. 4 is a detail view of the ball clutch, in section, taken on the line4-4 of Fig. 2; F i 5 is a detail view, in section, taken on the line 5-5of Fig. 2;

Fig. 6-is a view corresponding to Fig: 2, with the exception that thelead feeding mechanism is moved into a position to release the cl tch; c

Fig. 7 is alii elevation of the lead holding channel; y 0

Fig. 8 is an elevation of the pencil cap; Fig. 9 is a fragmentaryelevation of the point end of the. encil, in section, illustratig. 10 isa fragmentary tion, taken on the line 10--10 of Fig. 9.

rlhe numeral 11 indicates atubular outer lower end or point 12. Securedwithin Vthe point 12 is an axially locatedlead holding channel or tube.,13,-havinga ,funnel-like upper end. As

secured, at

tube 13 is frictiona ly .its -lower end, to the point 12, by longitudig,nelly lsplitting said tube,

so ythat in forcing the same into position saidlower end there-Specication of Letters Patent.

Application led April 25, 1918. Serial No.

' in the Patented Mar. 29, 1921.

of is slightly contracted. The rim of the upper end of the tube 18closely engages the internal Walls of the casing 11 and thereby holdsthe upper end of said tube against axial movement.

Rigidly but removably secured within the outer casing 11 is an innercasing 14, the lower end of which tightly fits within the funnel-likeupper end of the tube 13.

y Mounted in the upper ends of the inner casing 11, with freedom foraxial sliding movement, is a plunger head 15, the upper end portion ofwhich is reduced in diameter to afford a shoulder 16. This shoulder 16engages an inturned flange 17 on the upper end of the inner casing 14and prevents the plunger head 15 from being withdrawn therefrom. Theupper end of the plunger head 15 is made hollow to afford a chamber orreceptacle 18 for extra leads Z. The lead point of the pencil islikewise identilied by the letter Z. A cap or finger piece 19 istelescoped onto the reduced upper end of the plunger head 15 and isfrictionally held thereon by longitudinally splitting said plunger headso that the same is slightly contracted under the telescoping movementof said cap'thereon.

`Secured to` the lower end of the plunger head 15 is a long tubular pushplunger 20, axially located with respect to thetube 13, and affords aguide for an ejector 21 in the form of a long rod, the lower end ofwhich is adapted to enter the tube 13 and impart a step by step movementto the respective lead Z. Near the lower end of the inner casing 14 is atransverse partition 22, having an axial bore through which the ejector21 works. A coiled sprin 23 encircling the ejector 21 is compressedetween the lower end of the push plun er 20 and partition 22 andnormally"` ho ds' the said push plunger, plunger head,^and cap in theiruppermost positions. .y l

Steps of movements are imparted tothe ejector 21 under successivedownward movements of. .thecap 19 by one-way clutch. Thisclutchcomprises ball members 24 and ,a cone member 25, which has aslight limited axial movement in` respect to the push plunger 20. Saidball members 24 of the clutch are mounted in radial seats 26, formed'holder 13 `by inserting the encircling the push plunger 20 iscompressed between the upper end of the cone member 25 of the clutch anda collar 28 on said push plunger. The ball members 26 of the clutch arereleased from the cone member 24 thereof by an annular shoulder 29,pressed from the inner casing 14, between said cone member and thepartition 22.

The clutch is so arranged that the initial downward pressure on the cap19 will cause said clutch to impart a downward step of movement to theejector 21, and hence to the engaged lead Z. During this initialmovement of the cap 19 the spring 27 will cause a common movement of thecone member 25 with the push plunger 20. A further movement of the cap19 will carry the lower end of the cone member 25 of the clutch intoengagement with the shoulder 29.A A still further downward movement ofthe push plunger 2O will carry the ball members 24 of the Aclutch out ofengagement with the cone member 25 thereof, and thereby release theejector 21. When the cap 19 is released the spring 23 will lift the pushplunger 20 and thereby carry the ball members of the clutch into thecone member 25 thereof and return the same to normal position. Duringthe return movement of the push plunger 20 the clutch, of course, willbe inoperative and, therefore, the ball members 24 thereof will not gripor hold the ejector 21.

A friction device is provided for holding the ejector 21 during thereturn movement of the clutch, push plunger and cap to norballs 30 and atransversely split clampin ring 31, which bears upon said balls anyieldingly presses the same onto the ejector 21. he friction balls 30are mounted in radial seats 32, formed in the reduced upper end of aplug 33, which closes the lower end of the inner casing 14. The upperend of the plug 33 engages the partition 22, which holds the clampingcollar 31 against axial movement from said plug. The ejector 21 frl'eelyworks endwise through a bore in the p ug 33.

From the above description it isevident that the one-way clutch 24-25securely holds the ejector 21 so that the same actsV as a base ofresistance for the-lead Z when writin with the pencil. After the lead isown to the point 12, a downward pressure on the cap 19 will impart astep of movement turn, will impart a step of movement to the engagedlead Z, and thereby slightly project the same outward of new lead may beplaced in the tube or same into the point 12 while holding the cap 19pressed inward so as to release the clutch and thereby permit an inwardmovement of the to the ejector 21 which, inA

the point 12. AV

1f desired, the cap and inner casing, together with the parts carriedthereby, may be removed from the outer casing and a new lead droppedinthe upper end of said outer casing and which lead will be directed intothe tube 13 by the funnelshaped upper end thereof.

he construction shown in Figs. 9 and 10 is the saine as that shown .inthe other figures, with the exception that the friction device comprisesa pair of yieldingly pressed fingers 34, which engage opposite sides ofthe ejector 21 and yieldingly hold said ejector against upward movementunder the return movement of the push plunger. As shown, the lingers 34are formed from the single piece of spring metal having, in itstransverse portion, an axial opening for the ejector 21. Opposingshoulders 35, in the inner tube 14, hold the spring fingers 34 againstaxial movement within said inner casing.

What we claim is:

1. A pencil comprising a casing and a lead feeding device including anejector, ball clutch means adapted to engage said ejector to move it inone direction, means for releasing said ball clutch and frictional meansadapted to hold said ejector against free longitudinal movement.

2. A pencil, a casing, a lead feedin device comprising an ejectoradapted to reely engage the butt end. of the marking lead, a ball clutchadapted to engage said ejector to impart a step by step movement byrepeated longitudinal movements of said clutch and means for holdingsaid ejector during the inoperative movement of said clutch to allowsaid clutch to move said ejector and engage at different points, saidejector 21.

clutch being adapted to normally hold said ejector against backwardmovement in said casing.

3. A pencil, a. casing, a lead ejector rod adapted to constantly engageand form an abutment for the lead 1n said pencil, a clutch adapted tonormally engage said rod under spring tension, releasing means adaptedto release said clutch from engagement with said rod when said clutch ismoved in eXtreme position in one direction and resilient means adaptedto engage said rod to hold it against free longitudinal movement.

4. pencil comprising a casin having, at its lower end, a channel forfrictionally holding a piece of lead, a push plunger mounted inthecasing, a spring normally holding the push plunger in its uppermostposition, a lead ejector mounted in the push plunger with freedomv forendwise movement, a one-way clutch normally holding a friction devicefor holding the ejector during the return movement of the push plunger.

5. A pencil comprising a casing having, in its lower end, a channel forfrictionally holding a piece of lead, a push plunger mounted in thecasing, a spring normally holding the .push plunger in its uppermostposition, a lead ejector mounted in the push plunger with freedom forendwise movement, a one-way clutch normally holding the ejector againsta movement away from the lead and for imparting a variable step ofmovement thereto under the initial downward movement of the pushplunger, means for rendering the clutch inoperative at the limit of thedownward movement of the push plunger, and a friction device for holdingthe ejector during the return movement of the push plunger.

6. A pencll comprising a casing having, at its lower end, a lead holdingchannel, a push plunger mounted in the casing, a spring normally holdingthe push plunger in its uppermost position, an ejector mounted in thepush plunger with freedom for endwise movement, a one-way clutch in-.cluding a ball member carried by the push plunger, and a cone memberhaving a limited axial movement -in`respect to the push plunger, aspring operative on said cone member to normally hold the ball memberger having a hollow rear end, a ball clutch mounted on the forward endof said plunger, an ejector rod adapted to form an abutment for themarking lead in said pencil, resilient means adapted to hold said clutchunder spring tension in engagement with said rod, frictional meansadapted to hold said rod against free longitudinal movement and meanslfor rendering said clutch inoperative at the limit of its movement inone direction to release said rod and allow the marking lead in saidpencil to be moved back into said casing while said clutch is held inits released position.

In testimony whereof We aiiix our Signatures in presence of twoWitnesses.

FRANK J. VIE-BLING. ANDREW KVORNING. Witnesses:

HULDA LIEDER, HARRY D'. KILG'ORE.

